Bibliographic Citation
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Title | Constructed wetlands reduce cost of treating acid drainage |
Creator/Author | Douglas, J.H. |
Publication Date | 1992 Apr 01 |
OSTI Identifier | OSTI ID: 7181340 |
Other Number(s) | CODEN: XZ141 |
Resource Type | Journal Article |
Resource Relation | Environment Update ; Vol/Issue: 6:1 |
Subject | 010800 -- Coal, Lignite, & Peat-- Waste Management; ACID MINE DRAINAGE-- WATER TREATMENT;WETLANDS-- WATER TREATMENT; ASHES;BACTERIA;COAL MINES;DRAINAGE;IRON;MANGANESE;MARSHES;OXIDATION;PLANTS;SWAMPS;USA;WATER POLLUTION |
Related Subject | AQUATIC ECOSYSTEMS;CHEMICAL REACTIONS;COMBUSTION PRODUCTS;DEVELOPED COUNTRIES;ECOSYSTEMS;ELEMENTS;METALS;MICROORGANISMS;MINES;NORTH AMERICA;POLLUTION;RESIDUES;TERRESTRIAL ECOSYSTEMS;TRANSITION ELEMENTS;UNDERGROUND FACILITIES;WETLANDS |
Description/Abstract | The chemical treatment of acid drainage from ash piles at coal-fired power plants and from reclaimed coal mines can be prohibitively expensive and requires an active on-site operation.^Constructed aerobic wetlands developed by the Tennessee Valley Authority (TVA) have demonstrated an 80% success rate in consistently treating acid drainage to meet discharge standards, without chemical treatment.^Recent improvements show a potential for achieving an even higher level of compliance.^The TVA wetlands system relies primarily on aerobic oxidative reactions to remove iron and manganese.^The metals are transformed into insoluble compounds which precipitate.^Cattails and bulrushes planted in the wetlands have a high tolerance to such metals.^Fostering indigenous animal and plant communities in these ecosystems can produce also ecological advantages.^3 photos. |
Country of Publication | United States |
Language | English |
Format | Pages: 4-15 |
System Entry Date | 2001 May 13 |
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